Effect of strain rate on deformation mechanism of metastable β grains in TB17 titanium alloy
The effect of different strain rates (0.001,1,3×10<sup>3</sup> s<sup>-1</sup>) on metastable β grain deformation mechanism of TB17 titanium alloy was studied by optical microscope (OM), electron backscattered diffraction (EBSD), and transmission electron microscope(TEM). The...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Materials Engineering
2020-12-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000974 |
| Summary: | The effect of different strain rates (0.001,1,3×10<sup>3</sup> s<sup>-1</sup>) on metastable β grain deformation mechanism of TB17 titanium alloy was studied by optical microscope (OM), electron backscattered diffraction (EBSD), and transmission electron microscope(TEM). The results show that metastable β grains are highly sensitive to strain rate. The compressive strength of the alloy at strain rate of 1 s<sup>-1</sup> is about 25% higher than that at strain rate of 0.001 s<sup>-1</sup>. Under dynamic loading with strain rate of 3×10<sup>3</sup>s<sup>-1</sup>, the compressive strength of the alloy is also greatly improved. At lower strain rate (<1 s<sup>-1</sup>), slip is the main deformation mechanism and small angle grain boundaries are formed around slip lines. At high strain rate (3×10<sup>3</sup> s<sup>-1</sup>), the main deformation mechanism is stress-induced martensitic transformation. |
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| ISSN: | 1001-4381 1001-4381 |